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适用平台Windows
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To examine the value of a geometrical parameter (distance, angle, dihedral), one should select 2, 3 or 4 respective atoms by left-clicking: the value will be shown in textbox at the bottom. For selection of new atoms, old atoms must be first deselected by right-click. The button "Show" (to the right of the textbox) displays the value of the current parameter in the molecule's image. The chosen geometrical parameter can be altered by entering a new value in the textbox and pressing the "Set" button. If the button is pressed, the coordinates of only last selected atom will change; if the button is pressed, first and last selected atoms will move symmetrically. Other atoms bonded to the selected ones will move along with them; if that is undesirable, one should manually delete bonds or add new ones via selecting pairs of atoms and pressing Ctrl+B. For additional details on such geometry modifications, see
![Chemcraft正版软件使用教程](//l.b2b168.com/2022/08/19/10/202208191032565556474.jpg)
For the output files with geometry optimization, scan jobs, often the molecular geometry is switched several times during the optimization. To avoid this problem, choose the Tools button at the left (the job node should be clicked firstly), then "Set common orientation for all geometries".
![Chemcraft正版软件使用教程](//l.b2b168.com/2022/08/19/10/202208191032568636764.jpg)
If the output file contains bonds between atoms, derived from population analysis (Mulliken or NBO), Chemcraft renders these bonds on the image of molecule, otherwise the bonds are identified automatically using the distance algorithm. If the checkbox "Show bond properties" is enabled for an individual element of the list, this is the evidence that the bonds have been read from the file for this geometry. For Gaussian computations, POP(NBO) must be specified in the input file for bonds to be printed in the output file. In GAMESS-US log files the bonds are usually printed; by default, only bonds with bond order not less than 0.25 are shown in the image (this value can be altered in "Tools/Preferences/Gamess").
![Chemcraft正版软件使用教程](//l.b2b168.com/2022/08/19/10/202208191032568689004.jpg)
Chemcraft支持一个接口,用于快速创建具有非标准基组的GAMES-US输入文件的部分(图4)。从它们的描述中提取基集,可以在PNNL的网页上获得。她们还可以由用户gaussians来补充。
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